How did your friend get you to babysit her kids for the weekend, or your sister talk you into hosting the next book club meeting? They probably asked when you were anxious about a work project or stressed about making an …

The mere suggestion that others are watching can put people on their best behavior, and a new study finds that concern for reputation is more powerful than cash payments in getting neighbors to do the right thing.

Rats may not be, well, such rats after all. In the first study of its kind, researchers show that rats engage in empathy-driven behavior, helping to free a trapped cagemate for no reward other than relieving its fellow rat’s …